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- EMDB-8896: Focused classification map for VSL dimer bridging Subunit F and A... -

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Basic information

Entry
Database: EMDB / ID: EMD-8896
TitleFocused classification map for VSL dimer bridging Subunit F and A of Vps4p-Vta1p complex with peptide binding to the central pore of Vps4p
Map dataVps4-Vta1 complex
Sample
  • Complex: Vps4-Vta1 complex
Function / homology
Function and homology information


ESCRT IV complex / Sealing of the nuclear envelope (NE) by ESCRT-III / late endosome to lysosome transport via multivesicular body sorting pathway / intralumenal vesicle formation / Macroautophagy / protein retention in Golgi apparatus / Endosomal Sorting Complex Required For Transport (ESCRT) / ESCRT III complex / endosome transport via multivesicular body sorting pathway / late endosome to vacuole transport via multivesicular body sorting pathway ...ESCRT IV complex / Sealing of the nuclear envelope (NE) by ESCRT-III / late endosome to lysosome transport via multivesicular body sorting pathway / intralumenal vesicle formation / Macroautophagy / protein retention in Golgi apparatus / Endosomal Sorting Complex Required For Transport (ESCRT) / ESCRT III complex / endosome transport via multivesicular body sorting pathway / late endosome to vacuole transport via multivesicular body sorting pathway / ATP export / sterol metabolic process / nuclear membrane reassembly / midbody abscission / multivesicular body sorting pathway / vacuole organization / plasma membrane repair / membrane fission / late endosome to vacuole transport / ubiquitin-dependent protein catabolic process via the multivesicular body sorting pathway / multivesicular body assembly / reticulophagy / lipid transport / endosomal transport / nucleus organization / ATPase complex / ATPase activator activity / autophagosome maturation / nuclear pore / multivesicular body / macroautophagy / autophagy / protein transport / protein-macromolecule adaptor activity / midbody / endosome / endoplasmic reticulum / protein homodimerization activity / ATP hydrolysis activity / extracellular region / ATP binding / identical protein binding / membrane / plasma membrane / cytoplasm
Similarity search - Function
: / Type VI secretion system effector Hcp / Hcp1-like superfamily / Type VI secretion system effector, Hcp / Vta1/Callose synthase, N-terminal domain superfamily / Vta1/callose synthase, N-terminal / Vta1, C-terminal / Vacuolar protein sorting-associated protein Vta1-like / Vta1 like / Vta1 C-terminal domain ...: / Type VI secretion system effector Hcp / Hcp1-like superfamily / Type VI secretion system effector, Hcp / Vta1/Callose synthase, N-terminal domain superfamily / Vta1/callose synthase, N-terminal / Vta1, C-terminal / Vacuolar protein sorting-associated protein Vta1-like / Vta1 like / Vta1 C-terminal domain / Vacuolar protein sorting-associated protein 4, MIT domain / MIT (microtubule interacting and transport) domain / MIT domain superfamily / Vps4 oligomerisation, C-terminal / MIT domain / Microtubule Interacting and Trafficking molecule domain / Snf7 family / Snf7 / : / Vps4 C terminal oligomerisation domain / AAA ATPase, AAA+ lid domain / AAA+ lid domain / ATPase, AAA-type, conserved site / AAA-protein family signature. / ATPase family associated with various cellular activities (AAA) / ATPase, AAA-type, core / ATPases associated with a variety of cellular activities / AAA+ ATPase domain / P-loop containing nucleoside triphosphate hydrolase
Similarity search - Domain/homology
DOA4-independent degradation protein 4 / Vacuolar protein sorting-associated protein 4 / Vacuolar protein sorting-associated protein VTA1 / Protein hcp1
Similarity search - Component
Biological speciesSaccharomyces cerevisiae (brewer's yeast)
Methodsingle particle reconstruction / cryo EM / Resolution: 5.2 Å
AuthorsHan H / Monroe N
CitationJournal: Elife / Year: 2017
Title: The AAA ATPase Vps4 binds ESCRT-III substrates through a repeating array of dipeptide-binding pockets.
Authors: Han Han / Nicole Monroe / Wesley I Sundquist / Peter S Shen / Christopher P Hill /
Abstract: The hexameric AAA ATPase Vps4 drives membrane fission by remodeling and disassembling ESCRT-III filaments. Building upon our earlier 4.3 Å resolution cryo-EM structure (Monroe et al., 2017), we now ...The hexameric AAA ATPase Vps4 drives membrane fission by remodeling and disassembling ESCRT-III filaments. Building upon our earlier 4.3 Å resolution cryo-EM structure (Monroe et al., 2017), we now report a 3.2 Å structure of Vps4 bound to an ESCRT-III peptide substrate. The new structure reveals that the peptide approximates a β-strand conformation whose helical symmetry matches that of the five Vps4 subunits it contacts directly. Adjacent Vps4 subunits make equivalent interactions with successive substrate dipeptides through two distinct classes of side chain binding pockets formed primarily by Vps4 pore loop 1. These pockets accommodate a wide range of residues, while main chain hydrogen bonds may help dictate substrate-binding orientation. The structure supports a 'conveyor belt' model of translocation in which ATP binding allows a Vps4 subunit to join the growing end of the helix and engage the substrate, while hydrolysis and release promotes helix disassembly and substrate release at the lagging end.
History
DepositionAug 17, 2017-
Header (metadata) releaseAug 30, 2017-
Map releaseDec 6, 2017-
UpdateJul 18, 2018-
Current statusJul 18, 2018Processing site: RCSB / Status: Released

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Structure visualization

Movie
  • Surface view with section colored by density value
  • Surface level: 0.00791
  • Imaged by UCSF Chimera
  • Download
  • Surface view colored by radius
  • Surface level: 0.00791
  • Imaged by UCSF Chimera
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Movie viewer
Structure viewerEM map:
SurfViewMolmilJmol/JSmol
Supplemental images

emd_8896.png

Downloads & links

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Map

FileDownload / File: emd_8896.map.gz / Format: CCP4 / Size: 64 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
AnnotationVps4-Vta1 complex
Projections & slices

Image control

Size
Brightness
Contrast
Others
AxesZ (Sec.)Y (Row.)X (Col.)
1.1 Å/pix.
x 256 pix.
= 280.602 Å		1.1 Å/pix.
x 256 pix.
= 280.602 Å		1.1 Å/pix.
x 256 pix.
= 280.602 Å

Surface

Projections

Slices (1/3)

Slices (1/2)

Slices (2/3)

Images are generated by Spider.

Voxel sizeX=Y=Z: 1.0961 Å
Density

Histogram

Histogram (log scale)
Contour LevelBy AUTHOR: 0.00791 / Movie #1: 0.00791
Minimum - Maximum-0.013085015 - 0.0433631
Average (Standard dev.)-0.00025202357 (±0.0019978161)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions256256256
Spacing256256256
CellA=B=C: 280.6016 Å
α=β=γ: 90.0 °

CCP4 map header:

modeImage stored as Reals
Å/pix. X/Y/Z1.09610156251.09610156251.0961015625
M x/y/z256256256
origin x/y/z0.0000.0000.000
length x/y/z280.602280.602280.602
α/β/γ90.00090.00090.000
start NX/NY/NZ-152-37
NX/NY/NZ998271
MAP C/R/S123
start NC/NR/NS000
NC/NR/NS256256256
D min/max/mean-0.0130.043-0.000

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Supplemental data

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Sample components

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Entire : Vps4-Vta1 complex

EntireName: Vps4-Vta1 complex
Components
  • Complex: Vps4-Vta1 complex

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Supramolecule #1: Vps4-Vta1 complex

SupramoleculeName: Vps4-Vta1 complex / type: complex / ID: 1 / Parent: 0 / Macromolecule list: #1-#6
Source (natural)Organism: Saccharomyces cerevisiae (brewer's yeast)
Recombinant expressionOrganism: Escherichia coli BL21(DE3) (bacteria)

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Experimental details

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Structure determination

Methodcryo EM
Processingsingle particle reconstruction
Aggregation stateparticle

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Sample preparation

BufferpH: 7.4
GridModel: Quantifoil R1.2/1.3 / Material: COPPER / Mesh: 400 / Pretreatment - Type: GLOW DISCHARGE
VitrificationCryogen name: ETHANE / Chamber humidity: 80 % / Chamber temperature: 277 K / Instrument: FEI VITROBOT MARK III

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Electron microscopy

MicroscopeFEI TITAN KRIOS
Image recordingFilm or detector model: GATAN K2 SUMMIT (4k x 4k) / Detector mode: COUNTING / Average exposure time: 0.25 sec. / Average electron dose: 1.55 e/Å2
Electron beamAcceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN
Electron opticsIllumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD
Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company

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Image processing

Startup modelType of model: INSILICO MODEL / Details: e2initialmodel.py
Final reconstructionResolution.type: BY AUTHOR / Resolution: 5.2 Å / Resolution method: FSC 0.143 CUT-OFF / Software - Name: RELION (ver. 1.4) / Number images used: 59355
Initial angle assignmentType: ANGULAR RECONSTITUTION
Final angle assignmentType: ANGULAR RECONSTITUTION

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